An animation of the field lines of a magnet falling through a ring. When the magnet is
above the ring the field line "pressure" perpendicular to the field slows the magnet as
the field bunches up above the ring. When the magnet is below the ring the tension parallel to
the field again slows the magnet. The current in the ring does not go to zero just as the
magnet falls through the ring because of the inductance of the ring.